import random


# 四则运算

def szys():
    sym = ['＋', '－', '×', '÷']

    f = random.randint(0, 3)

    n1 = random.randint(1, 20)

    n2 = random.randint(1, 20)

    result = 0

    if f == 0:  # 加法

        result = n1 + n2

    elif f == 1:  # 减法，要先比较大小，防止输出负数

        n1, n2 = max(n1, n2), min(n1, n2)

        result = n1 - n2

    elif f == 2:  # 乘法

        result = n1 * n2

    elif f == 3:  # 除法，要比较大小，并循环取整除

        n1, n2 = max(n1, n2), min(n1, n2)

        while n1 % n2 != 0:
            n1 = random.randint(1, 10)

            n2 = random.randint(1, 10)

            n1, n2 = max(n1, n2), min(n1, n2)

        result = int(n1 / n2)

    print(n1, sym[f], n2, '= ', end='')

    return result


# 制作题库

def test():
    sym = ['＋', '－', '×', '÷']

    print('输入所需要的题目数量')

    n = int(input())

    result = []

    m = 0

    while m <= (n - 1):
        print(m + 1, end='、')

        result.append(szys())

        print(' ')

        m = m + 1

    m = 0

    print('对应的答案：')

    while m <= (n - 1):
        print(m + 1, '、', result[m])

        m = m + 1


print('选择想要的模式')

print('1、进行四则运算')

print('2、制作题库')

n = int(input())

# 当输入1时，进行四则运算，调用函数syzs()

if n == 1:

    while True:

        result = szys()

        j = input()

        s = int(j)

        if s == result:

            print('right')

        else:

            print('error.，the answer is', result)

# 当输入2时，进行制作题库

if n == 2:
    test()